This argument was officially used only by the ProblemBlock. If you need to get the base URL for static assets in your XBlock, please use `settings.STATIC_URL` directly, instead of `runtime.STATIC_URL`.
This argument was officially used only by the ProblemBlock. If you need to get the base URL for static assets in your XBlock, please use `settings.STATIC_URL` directly, instead of `runtime.STATIC_URL`.